Group GAP4(21,1)

Name: C7 : C3
Maximal quotient:GAP4(3,1)
Real polynomial:
x^21-84*x^19+2436*x^17-31136*x^15+2312*x^14+203840*x^13-30688*x^12-733824*x^\
11+152992*x^10+1480192*x^9-359296*x^8-1628096*x^7+413952*x^6+892416*x^5-2257\
92*x^4-189952*x^3+50176*x^2+3584*x-512
Common denominator of the automorphisms: 
9219840
Database of Galois polynomials by Bill Allombert and Igor Schein.
Last Modified: Sat, 16 Jun 2018 12:23:16 +0200
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